O20-O29
Medium Complexity

Other maternal disorders predominantly related to pregnancy

Primary Specialty: Obstetrics and Gynecology
Last Updated: 2025-09-09

ICD-10 Codes (200)

199 billable
0 category headers
O21
Billable
Excessive vomiting in pregnancy
View
O21.0
Billable
Mild hyperemesis gravidarum
View
O21.1
Billable
Hyperemesis gravidarum with metabolic disturbance
View
O21.2
Billable
Late vomiting of pregnancy
View
O21.8
Billable
Other vomiting complicating pregnancy
View
O21.9
Billable
Vomiting of pregnancy, unspecified
View
O22
Billable
Venous complications and hemorrhoids in pregnancy
View
O22.0
Billable
Varicose veins of lower extremity in pregnancy
View
O22.00
Billable
Varicose veins of lower extremity in pregnancy, unspecified trimester
View
O22.01
Billable
Varicose veins of lower extremity in pregnancy, first trimester
View
O22.02
Billable
Varicose veins of lower extremity in pregnancy, second trimester
View
O22.03
Billable
Varicose veins of lower extremity in pregnancy, third trimester
View
O22.1
Billable
Genital varices in pregnancy
View
O22.10
Billable
Genital varices in pregnancy, unspecified trimester
View
O22.11
Billable
Genital varices in pregnancy, first trimester
View
O22.12
Billable
Genital varices in pregnancy, second trimester
View
O22.13
Billable
Genital varices in pregnancy, third trimester
View
O22.2
Billable
Superficial thrombophlebitis in pregnancy
View
O22.20
Billable
Superficial thrombophlebitis in pregnancy, unspecified trimester
View
O22.21
Billable
Superficial thrombophlebitis in pregnancy, first trimester
View
O22.22
Billable
Superficial thrombophlebitis in pregnancy, second trimester
View
O22.23
Billable
Superficial thrombophlebitis in pregnancy, third trimester
View
O22.3
Billable
Deep phlebothrombosis in pregnancy
View
O22.30
Billable
Deep phlebothrombosis in pregnancy, unspecified trimester
View
O22.31
Billable
Deep phlebothrombosis in pregnancy, first trimester
View
O22.32
Billable
Deep phlebothrombosis in pregnancy, second trimester
View
O22.33
Billable
Deep phlebothrombosis in pregnancy, third trimester
View
O22.4
Billable
Hemorrhoids in pregnancy
View
O22.40
Billable
Hemorrhoids in pregnancy, unspecified trimester
View
O22.41
Billable
Hemorrhoids in pregnancy, first trimester
View
O22.42
Billable
Hemorrhoids in pregnancy, second trimester
View
O22.43
Billable
Hemorrhoids in pregnancy, third trimester
View
O22.5
Billable
Cerebral venous thrombosis in pregnancy
View
O22.50
Billable
Cerebral venous thrombosis in pregnancy, unspecified trimester
View
O22.51
Billable
Cerebral venous thrombosis in pregnancy, first trimester
View
O22.52
Billable
Cerebral venous thrombosis in pregnancy, second trimester
View
O22.53
Billable
Cerebral venous thrombosis in pregnancy, third trimester
View
O22.8
Billable
Other venous complications in pregnancy
View
O22.9
Billable
Venous complication in pregnancy, unspecified
View
O22.90
Billable
Venous complication in pregnancy, unspecified, unspecified trimester
View
O22.91
Billable
Venous complication in pregnancy, unspecified, first trimester
View
O22.92
Billable
Venous complication in pregnancy, unspecified, second trimester
View
O22.93
Billable
Venous complication in pregnancy, unspecified, third trimester
View
O23
Billable
Infections of genitourinary tract in pregnancy
View
O23.0
Billable
Infections of kidney in pregnancy
View
O23.00
Billable
Infections of kidney in pregnancy, unspecified trimester
View
O23.01
Billable
Infections of kidney in pregnancy, first trimester
View
O23.02
Billable
Infections of kidney in pregnancy, second trimester
View
O23.03
Billable
Infections of kidney in pregnancy, third trimester
View
O23.1
Billable
Infections of bladder in pregnancy
View
O23.10
Billable
Infections of bladder in pregnancy, unspecified trimester
View
O23.11
Billable
Infections of bladder in pregnancy, first trimester
View
O23.12
Billable
Infections of bladder in pregnancy, second trimester
View
O23.13
Billable
Infections of bladder in pregnancy, third trimester
View
O23.2
Billable
Infections of urethra in pregnancy
View
O23.20
Billable
Infections of urethra in pregnancy, unspecified trimester
View
O23.21
Billable
Infections of urethra in pregnancy, first trimester
View
O23.22
Billable
Infections of urethra in pregnancy, second trimester
View
O23.23
Billable
Infections of urethra in pregnancy, third trimester
View
O23.3
Billable
Infections of other parts of urinary tract in pregnancy
View
O23.30
Billable
Infections of other parts of urinary tract in pregnancy, unspecified trimester
View
O23.31
Billable
Infections of other parts of urinary tract in pregnancy, first trimester
View
O23.32
Billable
Infections of other parts of urinary tract in pregnancy, second trimester
View
O23.33
Billable
Infections of other parts of urinary tract in pregnancy, third trimester
View
O23.4
Billable
Unspecified infection of urinary tract in pregnancy
View
O23.40
Billable
Unspecified infection of urinary tract in pregnancy, unspecified trimester
View
O23.41
Billable
Unspecified infection of urinary tract in pregnancy, first trimester
View
O23.42
Billable
Unspecified infection of urinary tract in pregnancy, second trimester
View
O23.43
Billable
Unspecified infection of urinary tract in pregnancy, third trimester
View
O23.5
Billable
Infections of the genital tract in pregnancy
View
O23.51
Billable
Infection of cervix in pregnancy
View
O23.511
Billable
Infections of cervix in pregnancy, first trimester
View
O23.512
Billable
Infections of cervix in pregnancy, second trimester
View
O23.513
Billable
Infections of cervix in pregnancy, third trimester
View
O23.519
Billable
Infections of cervix in pregnancy, unspecified trimester
View
O23.52
Billable
Salpingo-oophoritis in pregnancy
View
O23.521
Billable
Salpingo-oophoritis in pregnancy, first trimester
View
O23.522
Billable
Salpingo-oophoritis in pregnancy, second trimester
View
O23.523
Billable
Salpingo-oophoritis in pregnancy, third trimester
View
O23.529
Billable
Salpingo-oophoritis in pregnancy, unspecified trimester
View
O23.59
Billable
Infection of other part of genital tract in pregnancy
View
O23.591
Billable
Infection of other part of genital tract in pregnancy, first trimester
View
O23.592
Billable
Infection of other part of genital tract in pregnancy, second trimester
View
O23.593
Billable
Infection of other part of genital tract in pregnancy, third trimester
View
O23.599
Billable
Infection of other part of genital tract in pregnancy, unspecified trimester
View
O23.9
Billable
Unspecified genitourinary tract infection in pregnancy
View
O23.90
Billable
Unspecified genitourinary tract infection in pregnancy, unspecified trimester
View
O23.91
Billable
Unspecified genitourinary tract infection in pregnancy, first trimester
View
O23.92
Billable
Unspecified genitourinary tract infection in pregnancy, second trimester
View
O23.93
Billable
Unspecified genitourinary tract infection in pregnancy, third trimester
View
O24
Diabetes mellitus in pregnancy, childbirth, and the puerperium
View
O24.0
Billable
Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium
View
O24.01
Billable
Pre-existing type 1 diabetes mellitus, in pregnancy
View
O24.011
Billable
Pre-existing type 1 diabetes mellitus, in pregnancy, first trimester
View
O24.012
Billable
Pre-existing type 1 diabetes mellitus, in pregnancy, second trimester
View
O24.013
Billable
Pre-existing type 1 diabetes mellitus, in pregnancy, third trimester
View
O24.019
Billable
Pre-existing type 1 diabetes mellitus, in pregnancy, unspecified trimester
View
O24.02
Billable
Pre-existing type 1 diabetes mellitus, in childbirth
View
O24.03
Billable
Pre-existing type 1 diabetes mellitus, in the puerperium
View
O24.1
Billable
Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium
View
O24.11
Billable
Pre-existing type 2 diabetes mellitus, in pregnancy
View
O24.111
Billable
Pre-existing type 2 diabetes mellitus, in pregnancy, first trimester
View
O24.112
Billable
Pre-existing type 2 diabetes mellitus, in pregnancy, second trimester
View
O24.113
Billable
Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester
View
O24.119
Billable
Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester
View
O24.12
Billable
Pre-existing type 2 diabetes mellitus, in childbirth
View
O24.13
Billable
Pre-existing type 2 diabetes mellitus, in the puerperium
View
O24.3
Billable
Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium
View
O24.31
Billable
Unspecified pre-existing diabetes mellitus in pregnancy
View
O24.311
Billable
Unspecified pre-existing diabetes mellitus in pregnancy, first trimester
View
O24.312
Billable
Unspecified pre-existing diabetes mellitus in pregnancy, second trimester
View
O24.313
Billable
Unspecified pre-existing diabetes mellitus in pregnancy, third trimester
View
O24.319
Billable
Unspecified pre-existing diabetes mellitus in pregnancy, unspecified trimester
View
O24.32
Billable
Unspecified pre-existing diabetes mellitus in childbirth
View
O24.33
Billable
Unspecified pre-existing diabetes mellitus in the puerperium
View
O24.4
Billable
Gestational diabetes mellitus
View
O24.41
Billable
Gestational diabetes mellitus in pregnancy
View
O24.410
Billable
Gestational diabetes mellitus in pregnancy, diet controlled
View
O24.414
Billable
Gestational diabetes mellitus in pregnancy, insulin controlled
View
O24.415
Billable
Gestational diabetes mellitus in pregnancy, controlled by oral hypoglycemic drugs
View
O24.419
Billable
Gestational diabetes mellitus in pregnancy, unspecified control
View
O24.42
Billable
Gestational diabetes mellitus in childbirth
View
O24.420
Billable
Gestational diabetes mellitus in childbirth, diet controlled
View
O24.424
Billable
Gestational diabetes mellitus in childbirth, insulin controlled
View
O24.425
Billable
Gestational diabetes mellitus in childbirth, controlled by oral hypoglycemic drugs
View
O24.429
Billable
Gestational diabetes mellitus in childbirth, unspecified control
View
O24.43
Billable
Gestational diabetes mellitus in the puerperium
View
O24.430
Billable
Gestational diabetes mellitus in the puerperium, diet controlled
View
O24.434
Billable
Gestational diabetes mellitus in the puerperium, insulin controlled
View
O24.435
Billable
Gestational diabetes mellitus in puerperium, controlled by oral hypoglycemic drugs
View
O24.439
Billable
Gestational diabetes mellitus in the puerperium, unspecified control
View
O24.8
Billable
Other pre-existing diabetes mellitus in pregnancy, childbirth, and the puerperium
View
O24.81
Billable
Other pre-existing diabetes mellitus in pregnancy
View
O24.811
Billable
Other pre-existing diabetes mellitus in pregnancy, first trimester
View
O24.812
Billable
Other pre-existing diabetes mellitus in pregnancy, second trimester
View
O24.813
Billable
Other pre-existing diabetes mellitus in pregnancy, third trimester
View
O24.819
Billable
Other pre-existing diabetes mellitus in pregnancy, unspecified trimester
View
O24.82
Billable
Other pre-existing diabetes mellitus in childbirth
View
O24.83
Billable
Other pre-existing diabetes mellitus in the puerperium
View
O24.9
Billable
Unspecified diabetes mellitus in pregnancy, childbirth and the puerperium
View
O24.91
Billable
Unspecified diabetes mellitus in pregnancy
View
O24.911
Billable
Unspecified diabetes mellitus in pregnancy, first trimester
View
O24.912
Billable
Unspecified diabetes mellitus in pregnancy, second trimester
View
O24.913
Billable
Unspecified diabetes mellitus in pregnancy, third trimester
View
O24.919
Billable
Unspecified diabetes mellitus in pregnancy, unspecified trimester
View
O24.92
Billable
Unspecified diabetes mellitus in childbirth
View
O24.93
Billable
Unspecified diabetes mellitus in the puerperium
View
O25
Billable
Malnutrition in pregnancy, childbirth and the puerperium
View
O25.1
Billable
Malnutrition in pregnancy
View
O25.10
Billable
Malnutrition in pregnancy, unspecified trimester
View
O25.11
Billable
Malnutrition in pregnancy, first trimester
View
O25.12
Billable
Malnutrition in pregnancy, second trimester
View
O25.13
Billable
Malnutrition in pregnancy, third trimester
View
O25.2
Billable
Malnutrition in childbirth
View
O25.3
Billable
Malnutrition in the puerperium
View
O26
Billable
Maternal care for other conditions predominantly related to pregnancy
View
O26.0
Billable
Excessive weight gain in pregnancy
View
O26.00
Billable
Excessive weight gain in pregnancy, unspecified trimester
View
O26.01
Billable
Excessive weight gain in pregnancy, first trimester
View
O26.02
Billable
Excessive weight gain in pregnancy, second trimester
View
O26.03
Billable
Excessive weight gain in pregnancy, third trimester
View
O26.1
Billable
Low weight gain in pregnancy
View
O26.10
Billable
Low weight gain in pregnancy, unspecified trimester
View
O26.11
Billable
Low weight gain in pregnancy, first trimester
View
O26.12
Billable
Low weight gain in pregnancy, second trimester
View
O26.13
Billable
Low weight gain in pregnancy, third trimester
View
O26.2
Billable
Pregnancy care for patient with recurrent pregnancy loss
View
O26.20
Billable
Pregnancy care for patient with recurrent pregnancy loss, unspecified trimester
View
O26.21
Billable
Pregnancy care for patient with recurrent pregnancy loss, first trimester
View
O26.22
Billable
Pregnancy care for patient with recurrent pregnancy loss, second trimester
View
O26.23
Billable
Pregnancy care for patient with recurrent pregnancy loss, third trimester
View
O26.3
Billable
Retained intrauterine contraceptive device in pregnancy
View
O26.30
Billable
Retained intrauterine contraceptive device in pregnancy, unspecified trimester
View
O26.31
Billable
Retained intrauterine contraceptive device in pregnancy, first trimester
View
O26.32
Billable
Retained intrauterine contraceptive device in pregnancy, second trimester
View
O26.33
Billable
Retained intrauterine contraceptive device in pregnancy, third trimester
View
O26.4
Billable
Herpes gestationis
View
O26.40
Billable
Herpes gestationis, unspecified trimester
View
O26.41
Billable
Herpes gestationis, first trimester
View
O26.42
Billable
Herpes gestationis, second trimester
View
O26.43
Billable
Herpes gestationis, third trimester
View
O26.5
Billable
Maternal hypotension syndrome
View
O26.50
Billable
Maternal hypotension syndrome, unspecified trimester
View
O26.51
Billable
Maternal hypotension syndrome, first trimester
View
O26.52
Billable
Maternal hypotension syndrome, second trimester
View
O26.53
Billable
Maternal hypotension syndrome, third trimester
View
O26.6
Billable
Liver and biliary tract disorders in pregnancy, childbirth and the puerperium
View
O26.61
Billable
Liver and biliary tract disorders in pregnancy
View
O26.611
Billable
Liver and biliary tract disorders in pregnancy, first trimester
View
O26.612
Billable
Liver and biliary tract disorders in pregnancy, second trimester
View
O26.613
Billable
Liver and biliary tract disorders in pregnancy, third trimester
View
O26.619
Billable
Liver and biliary tract disorders in pregnancy, unspecified trimester
View
O26.62
Billable
Liver and biliary tract disorders in childbirth
View
O26.63
Billable
Liver and biliary tract disorders in the puerperium
View
O26.64
Billable
Intrahepatic cholestasis of pregnancy
View
O26.641
Billable
Intrahepatic cholestasis of pregnancy, first trimester
View
O26.642
Billable
Intrahepatic cholestasis of pregnancy, second trimester
View
O26.643
Billable
Intrahepatic cholestasis of pregnancy, third trimester
View
O26.649
Billable
Intrahepatic cholestasis of pregnancy, unspecified trimester
View
O26.7
Billable
Subluxation of symphysis (pubis) in pregnancy, childbirth and the puerperium
View

Updates & Changes

FY 2026 Updates

Current Year

New Codes (1)

O03.87
Complete or unspecified spontaneous abortion with embolism, complicated by delayed or excessive hemorrhage

Revised Codes (1)

O00.9
Ectopic pregnancy, unspecified - updated hCG correlation requirements

Deleted Codes

No codes deleted in this range for FY 2026

Historical Changes

  • •FY 2025: Routine maintenance updates with minor terminology clarifications
  • •FY 2024: Enhanced specificity requirements for certain code ranges
  • •FY 2023: Updated documentation guidelines for improved clarity

Upcoming Changes

  • •Proposed updates pending review by Coordination and Maintenance Committee
  • •Under consideration: Enhanced digital health integration codes

Implementation Guidance

  • •Review all FY 2026 updates for O20-O29 codes before implementation
  • •Always verify the most current codes in the ICD-10-CM manual
  • •Ensure clinical documentation supports the selected diagnosis codes
  • +3 more guidance items...

Range Overview

high priority

The ICD-10 category O20-O29 covers a range of maternal disorders predominantly related to pregnancy. These codes are used to document conditions such as gestational edema, proteinuria, and hypertensive disorders, among others. They are crucial for tracking maternal health and outcomes, informing treatment plans, and supporting billing and reimbursement processes.

Key Usage Points:

  • •Use these codes for conditions arising during pregnancy that are not linked to the fetus or amniotic sac.
  • •The codes can be used throughout pregnancy and the puerperium.
  • •Note the trimester in the code, if applicable.
  • •Use additional codes for any associated maternal complications.
  • •Remember to code first any associated complication of pregnancy, if applicable.

Coding Guidelines

When to Use:

  • ✓When a pregnant patient presents with hypertensive disorders.
  • ✓When a patient develops gestational diabetes.
  • ✓When a patient experiences excessive vomiting during pregnancy.
  • ✓When a patient has early onset of delivery.

When NOT to Use:

  • ✗When the condition is not related to the pregnancy.
  • ✗When the condition is related to the fetus or amniotic sac.
  • ✗When the condition arises after the puerperium.
  • ✗When the condition is a pre-existing maternal condition.

Code Exclusions

Always verify exclusions with the latest ICD-10-CM official guidelines.

Documentation Requirements

Documentation for codes O20-O29 should include a clear description of the condition, its relation to the pregnancy, and any associated complications. The trimester should also be noted, if applicable.

Clinical Information:

  • •Detailed description of the condition.
  • •Relation of the condition to the pregnancy.
  • •Any associated complications.
  • •The trimester, if applicable.

Supporting Evidence:

  • •Clinical notes.
  • •Lab results.
  • •Imaging results.
Good Documentation Example:

Patient presented in third trimester with gestational hypertension. Blood pressure readings consistently above 140/90. No signs of preeclampsia.

Poor Documentation Example:

Patient has high blood pressure.

Common Documentation Errors:

  • âš Not specifying the trimester.
  • âš Not linking the condition to the pregnancy.
  • âš Not documenting associated complications.

Range Statistics

Total Codes
199
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:15

Coding Complexity

Medium
Complexity Rating

The complexity of these codes is medium due to the need to accurately document the condition, its relation to the pregnancy, any associated complications, and the trimester. Additionally, coders must be aware of exclusions.

Key Factors:
  • â–¸Determining the relation of the condition to the pregnancy.
  • â–¸Identifying any associated complications.
  • â–¸Noting the trimester, if applicable.
  • â–¸Navigating exclusions.

Specialty Focus

These codes are most commonly used in obstetrics and gynecology, but may also be relevant in family practice and internal medicine.

Primary Specialties:
Obstetrics and Gynecology
70%
Family Practice
20%
Internal Medicine
10%
Clinical Scenarios:
  • • A patient presents with gestational diabetes.
  • • A patient in her second trimester develops preeclampsia.
  • • A patient experiences excessive vomiting during her first trimester.
  • • A patient has early onset of delivery.

Resources & References

Resources for these codes include the ICD-10-CM official guidelines, the American College of Obstetricians and Gynecologists (ACOG), and various clinical reference books and online resources.

Official Guidelines:

  • ICD-10-CM Official Guidelines for Coding and Reporting
  • ACOG Practice Bulletins
  • World Health Organization ICD-10 guidelines

Clinical References:

  • Clinical Obstetrics and Gynecology journal
  • Obstetrics & Gynecology journal

Educational Materials:

  • ACOG educational materials
  • ICD-10-CM coding training courses

Frequently Asked Questions

Can these codes be used for conditions arising after the puerperium?

No, these codes are for conditions arising during pregnancy and the puerperium only.